import Vue from 'vue'
import Router from 'vue-router'
import Login from '../components/Login.vue'
import Home from '../components/Home.vue'
import Welcome from '../components/Welcome.vue'
import Users from '../components/Users.vue'

Vue.use(Router)

const router = new Router({
  routes: [
    {
      path: '/',
      redirect: '/login'
    },
    {
      path: '/login',
      component: Login
    },
    {
      path: '/home',
      component: Home,
      redirect:'/welcome',
      children:[
        {
          path:'/welcome',
          component:Welcome
        },
        {
          path:'/users',
          component:Users
        }
      ]
    }
  ]
})

//挂在路由导航守卫
router.beforeEach((to,from,next) => {
  //用户直接访问登录也 直接放行
  if(to.path === '/login') return next()
  // 判断是否登录
  const tokenStr = window.sessionStorage.getItem('token')
  // 没有登陆 强制跳转登录页
  if(!tokenStr) return next('/login')
  next()
})

export default router
